Hi Rob... I live close by in Westmont, IL, and for the past 10 + years, I've used Euroquipe; I've no vested interest in the Indy... it's located in St. Charles, IL... a little further than you may be interested to travel (about 30 miles), but Euroquipe's integrity & workmanship has been worth it for me. Pretty sure they'll do a Pre-Purchase Evaluation for a Cayenne, but if they don't, they might know another place that might do so. Check them out at: